Fuel cell module, assembly positioning assembly and vehicle

Abstract

The invention discloses a fuel cell module, an assembling and positioning assembly and a vehicle. The fuel cell module comprises a box body, a galvanic pile, an insulating support assembly and more than two cross beams, the insulating support assembly is arranged between the box body and the galvanic pile, the insulating support assembly is in contact with each side surface of a reactor core of the galvanic pile and each inner side surface of the bearing frame, and the insulating support assembly can support the side surface of the reactor core and resist inter-layer slippage of the galvanic pile; gaps are formed between the insulating supporting assemblies and the end plates and the collector plates of the electric pile, and the gaps can serve as buffer spaces, so that the insulating supporting assemblies are prevented from being damaged due to impact of the end plates and the collector plates. The more than two cross beams are arranged between the blind end of the electric pile and the box body, the two ends of each cross beam are connected to the bearing frame, and the bearing frame applies fastening force towards the air inlet end plate assembly through the cross beams, so that box body packaging is realized. The cross beam abuts against a limiting groove formed in the blind end plate assembly, and the blind end plate assembly is limited through the bearing frame and the cross beam.

Description

Technical Field

[0001] The present application belongs to the field of fuel cell technology, and in particular, relates to a fuel cell module, an assembly positioning component, and a vehicle. Background Art

[0002] A fuel cell stack is composed of multiple single cells connected in series, with current collecting plates, insulating plates, air intake end plates, blind end plates and other parts distributed at both ends. It is necessary to apply a certain pressing force through packaging parts such as tie rods, steel strips, and screws, or use overall packaging, with the outer shell providing the pressing force. Overall packaging has many advantages, such as reducing the types and number of stack parts, reducing assembly difficulty, improving production efficiency, and improving stack reliability, and has gradually become the mainstream packaging technology for fuel cell stacks.

[0003] Under external vibration and impact excitation, relative slip occurs between cells, and then the middle of the fuel cell module is significantly deformed, which will lead to structural damage and seal failure of the cell. Since the overall package does not have independent packaging components to resist interlayer slip, it can only improve the stack's ability to resist interlayer slip by increasing the clamping force, increasing the interlayer friction coefficient, adding vibration damping pads and other measures, thereby improving the reliability of the fuel cell.

[0004] In recent years, as the commercialization of fuel cells has accelerated and the trend towards high power has become apparent, the number of cells in the stack has also increased, and the area of ​​the cells has further increased. The above-mentioned solution to prevent relative slip between cells is difficult to implement in high-power and ultra-high-power fuel cells. Therefore, how to improve the reliability of fuel cells has gradually become the focus of the industry. Summary of the invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a fuel cell module, an assembly positioning component and a vehicle, which have a simple structure, high reliability and can effectively support the battery core of the battery stack.

[0006] In a first aspect of the present application, a fuel cell module is provided, comprising:

[0007] The box body comprises a bearing frame, an air intake end plate assembly and a blind end side plate, wherein the bearing frame is provided with an air intake port and a blind end port which are interconnected; the air intake end plate assembly is connected to the bearing frame and covers the air intake port; the blind end side plate is connected to the bearing frame and covers the blind end port;

[0008] A battery stack is arranged in the supporting frame, the battery stack comprises the intake end plate assembly, the intake end current collecting plate, the stack core, the blind end current collecting plate and the blind end plate assembly arranged in sequence, the stack core comprises more than two stacked single cells;

[0009] An insulating support assembly is provided between the box and the stack, the insulating support assembly is in contact with each side surface of the core and each inner side surface of the supporting frame, and has gaps with the intake end plate assembly, the intake end current collector, the blind end current collector and the blind end plate assembly; the insulating support assembly includes a plurality of insulating support members spaced apart along the circumference of the stack;

[0010] Two or more cross beams are spaced and distributed at one end of the box body close to the blind end side plate; both ends of the two or more cross beams are connected to the supporting frame, so that the supporting frame applies a fastening force along the stacking direction to the stack through the cross beams and in cooperation with the air intake end plate assembly;

[0011] Among them, a first positioning structure is provided on the air intake end plate assembly and / or the air intake end collecting plate; a second positioning structure is provided on the blind end collecting plate and / or the blind end plate assembly; a limiting structure is provided on the supporting frame and / or the insulating support assembly; and a plurality of limiting grooves corresponding to the cross beams are provided on the outer end surface of the blind end plate assembly, the cross beams are arranged in the corresponding limiting grooves, and at least one cross beam is pressed against the groove wall of the limiting groove.

[0012] In some embodiments, the insulating support member extends along the stacking direction, and a plurality of the insulating support members are respectively distributed at each corner of the battery stack and each side of the battery stack;

[0013] The limiting structure is configured as at least one limiting boss distributed on the inner side surface of the supporting frame, and a limiting groove is correspondingly provided on at least one of the insulating support members distributed on the side surface of the battery stack. The limiting boss extends into the limiting groove and presses against the groove wall of the limiting groove along the circumference of the battery stack.

[0014] In some embodiments, the side of the load-bearing frame is provided with one or more openings, and the box body further comprises one or more cover plates, which are connected to the load-bearing frame and cover the openings;

[0015] One or more first limiting blocks are disposed on the inner side surface of the cover plate. The first limiting blocks extend into the limiting groove and press against the groove wall of the limiting groove along the circumference of the battery stack.

[0016] In some embodiments, at least one of the insulating support members distributed on the side of the battery stack corresponds to the position of the crossbeam, and a second limit block is provided on the crossbeam. The second limit block extends into the limit groove and presses against the groove wall of the limit groove along the circumference of the battery stack.

[0017] In some embodiments, a plurality of limiting columns are provided on the blind end side plate, one end of the plurality of insulating support members is pressed against the supporting frame or the air intake end plate assembly, and the other end is in one-to-one contact with the plurality of limiting columns.

[0018] In some embodiments, the first positioning structure is configured as a first positioning pin located on the intake end plate assembly, and the intake end collector plate is provided with a first positioning hole for the first positioning pin to extend into;

[0019] The second positioning structure is configured as a second positioning pin located on the blind end plate assembly, and the blind end current collecting plate is provided with a second positioning hole for the second positioning pin to extend into.

[0020] In some embodiments, the blind end plate assembly includes a blind end plate, a disc spring and a disc spring support plate stacked in sequence, the second positioning structure is arranged on the first end face of the blind end plate, and the limit groove is arranged on the outer end face of the disc spring support plate.

[0021] In some embodiments, a plurality of guide bosses for positioning the disc spring are provided on the second end face of the blind end plate, and the disc spring is sleeved on the guide bosses; a plurality of guide holes are correspondingly provided on the disc spring support plate, and the guide bosses extend into the guide holes, and at least one of the guide bosses is pressed against the hole wall of the guide hole.

[0022] In some embodiments, a first boss and a second boss are provided on two opposite sides of the disc spring support plate; the first boss abuts against the supporting frame;

[0023] A third boss is disposed on the crossbeam, and the third boss abuts against the second boss.

[0024] In some embodiments, the insulating support members located on two adjacent side surfaces of the battery stack are provided with through grooves penetrating along the stacking direction of the battery stack, and the notches of the through grooves face the battery stack.

[0025] In a second aspect of the present application, there is provided an assembly positioning assembly for assembling the fuel cell module of the first aspect, comprising:

[0026] More than four positioning rods are distributed around the battery stack, and along the stacking direction of the battery stack, the length of each positioning rod is not less than the sum of the length of the box and the height difference Δh of the battery stack before and after press-fitting;

[0027] A fixed bracket, installed on the peripheral side of the blind end of the bearing frame and fixedly connected to the corresponding positioning rod;

[0028] The guide bracket is installed on the peripheral side of the blind end portion of the bearing frame, and the end surface of the guide bracket is in contact with the side surface of the blind end end plate assembly.

[0029] In some embodiments, when the insulating support members located at two adjacent side surfaces of the battery stack are provided with through grooves, at least two of the positioning rods extend into the through grooves of the insulating support members.

[0030] In some embodiments, when the disc spring support plate is provided with a first boss, the end surface of the guide bracket is in contact with the first boss.

[0031] In a third aspect of the present application, a vehicle is provided, characterized in that it includes the fuel cell module of the first aspect.

[0032] According to the fuel cell module provided by one or more embodiments of the present application, an insulating support assembly is provided between the box and the stack, and the insulating support assembly is in contact with each side of the core of the stack and each inner side of the supporting frame, and can support the side of the core, resist the slippage between the core layers, and play an insulating role. Due to the insulation requirements, the insulating support assembly is usually composed of non-metallic materials, and the collector plates and end plates at both ends of the stack have high density and mass, and the impact force generated when the vehicle is bumpy is relatively large. The insulating support assembly of the present application and the intake end plate assembly, intake end collector plate, blind end collector plate and blind end plate assembly of the stack all have gaps, which can be used as a buffer space to prevent the insulating support assembly from being damaged by the impact of the end plate and collector plate.

[0033] Since there is a gap between the end plates, current collecting plates and insulating support assemblies at both ends of the fuel cell stack, it is necessary to set a limiting structure for the above-mentioned parts in the direction perpendicular to the stacking direction. Specifically, the air intake end plate assembly is connected to the supporting frame to achieve limitation in all directions. A first positioning structure is provided on the air intake end plate assembly and / or the air intake end current collecting plate, and the air intake end current collecting plate is limited by the first positioning structure; a second positioning structure is provided on the blind end current collecting plate and / or the blind end end plate assembly, and the blind end current collecting plate and the blind end end plate assembly are limited by the second positioning structure, and the blind end end plate assembly is also limited by the limiting grooves provided thereon and the abutment with the crossbeams, and the crossbeams are spaced apart and distributed at one end of the box body close to the blind end side plate, and both ends are connected to the supporting frame. The position of the crossbeam is determined, and thus the position of the blind end plate assembly is determined.

[0034] More importantly, the load-bearing frame applies a fastening force toward the intake end plate assembly through the crossbeam, and cooperates with the intake end plate assembly to apply a fastening force toward the crossbeam, so that the load-bearing frame and the intake end plate assembly jointly apply a fastening force to the stack in the stacking direction to achieve box packaging. The press force of the press is transferred by a number of crossbeams arranged at one end of the stack, and a number of crossbeams distributed at intervals form a limiting surface, which jointly apply a fastening force to the stack, and the force distribution of the stack is uniform. Since the beams are distributed at intervals, the intervals between them can be used for the pressure head of the press to pass through, which will not affect the press installation operation of the press and facilitate the assembly of the stack.

[0035] According to the fuel cell module provided by one or more embodiments of the present application, the box packaging is adopted, and the intake end plate assembly has the functions of the shell end plate and the intake end plate at the same time, so the volume power density of the entire fuel cell module is improved, and the stack is easy to install. By providing an insulating support component to support the stack in different areas, the core can be fully covered and the anti-slip effect can be achieved, and the insulating support component can be prevented from being damaged by the impact of the end plate and the collector plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 A schematic structural diagram of a fuel cell module in one or more embodiments of the present application is shown. To facilitate display of the internal structure, the upper cover plate and the high-voltage assembly are hidden in the figure.

[0038] Figure 2 Shows Figure 1 Exploded diagram.

[0039] Figure 3 Shows Figure 2 A partial enlarged view of point A.

[0040] Figure 4 Shows Figure 1 Schematic diagram of the structure of the supporting frame of the fuel cell module.

[0041] Figure 5 Shows Figure 1 Right view of .

[0042] Figure 6 Shows Figure 1 AA section view.

[0043] Figure 7 Shows Figure 6 A partial enlarged view of point E.

[0044] Figure 8 Shows Figure 6 A partial enlarged view of point F.

[0045] Fig. 9 Shows Figure 1 main view.

[0046] Fig.10 Shows Fig. 9 BB section view.

[0047] Fig.11 Shows Fig. 9 CC section view.

[0048] Fig.12 Shows Fig. 9 DD section view.

[0049] Fig.13 A schematic structural diagram of a fuel cell module in one or more embodiments of the present application is shown. To facilitate display of the internal structure, the upper cover plate is hidden in the figure.

[0050] Fig.14 Shows Fig.13 Top view of the .

[0051] Fig.15 Shows Fig.14 GG section view.

[0052] Fig.16 Shows Fig.14 HH section view.

[0053] Fig.17 Shows Fig.15 A local enlarged view of location I.

[0054] Fig.18 Shows Fig.16 A partial enlarged view of point J.

[0055] Fig.19 Shows Fig.13 Schematic diagram of the structure of the disc spring support plate of the fuel cell module.

[0056] Fig. 20 Shows Fig.19 main view.

[0057] Fig.21 Shows Fig.13 Schematic diagram of the structure of the crossbeam of the fuel cell module.

[0058] Fig. 22A schematic structural diagram of a fuel cell module connected to an assembly positioning component in one or more embodiments of the present application is shown.

[0059] Fig.23 Shows Fig. 22 Right view of .

[0060] Description of reference numerals: 10 - insulation support assembly; 11 - insulation support member, 11a - side support member, 11b - corner support member; 12 - limiting groove; 13 - through groove; 14 - ridge. 20 - cross beam, 21 - second limiting block, 22 - third boss. 30 - positioning rod; 40 - fixing bracket; 50 - guide bracket.

[0061] 100-box, 101-upper opening, 102-inlet port, 103-blind port, 104-side opening, 105-low-pressure installation port; 110-bearing frame, 111-limiting boss, 112-longitudinal beam, 113-external protrusion, 114-guide part; 120-blind end side plate, 121-limiting column; 140-side cover plate, 141-first limiting block; 150-high-pressure operation cover plate; 160-low-pressure packaging component.

[0062] 200-fuel cell stack; 210-intake end plate assembly, 211-first positioning pin; 230-intake end collector plate, 231-first positioning hole; 240-core; 250-blind end collector plate, 251-second positioning hole; 260-blind end insulation plate; 270-blind end plate assembly, 271-blind end plate, 272-disc spring, 273-disc spring support plate, 274-limiting groove, 275-second positioning pin, 276-guide boss, 277-guide hole, 278-first boss, 279-second boss. 300-high voltage assembly. DETAILED DESCRIPTION

[0063] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0064] In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those of ordinary skill in the art may recognize the application of other processes and / or the use of other materials.

[0065] In a fuel cell stack, compared with end plates, current collectors, insulating plates and other parts, the core cells are thinner, smaller in mass, and numerous. In a stack with an output power exceeding 300KW, the number of cells is usually more than 500. Therefore, interlayer slip and waist collapse problems of fuel cell stacks mainly occur in the core. Under external vibration and impact excitation, relative slip occurs between cells, and then obvious deformation occurs in the middle of the fuel cell module, which will cause damage to the cell structure and seal failure.

[0066] In the related art, generally, various measures such as increasing the pressing force, increasing the interlayer friction coefficient, adding mechanical support structure, adding vibration damping and vibration isolation pads are adopted to improve the anti-interlayer slip ability of the stack, thereby improving the reliability of the fuel cell. In the related art, adding mechanical support structure is divided into two categories: "internal limit" and "external limit". "Internal limit" is realized by setting an "interlocking" structure between adjacent parts inside the fuel cell stack, which usually occurs between adjacent single cells, such as CN116565226A, setting mutually matching concave and convex structures on the battery, which will lead to a complex structure of the single cell and is not conducive to the transmission and distribution of the tightening force after compression; "external limit" is realized by setting an additional support limit structure between the internal parts of the fuel cell stack and the outer shell, such as CN111785999A, setting the shell anti-collapse waist structure components and the core structure to fit all. Due to the insulation requirements between the outer shell and the stack, the above-mentioned support structure is usually composed of non-metallic materials. The collectors and end plates at both ends of the stack have high density and mass, which have a large impact on the support structure and are easy to damage the support structure.

[0067] Therefore, it is necessary to design a support structure that is simple in structure, highly reliable and can effectively support the fuel cell stack. The present application aims to provide a fuel cell module that includes a support structure that meets the above requirements, which can solve the problem that the "inner limit" mechanical support structure of the fuel cell stack in the related technology leads to a complex structure of the single cell, which is not conducive to the transmission and distribution of the tightening force after compression, and can also solve the problem that the "external limit" support structure is easily damaged.

[0068] The design concept of this application is: applied to the "box packaging" technical route of fuel cell modules, through the partitioned support design of the combination of "end plate, collecting plate internal limit" + "core external limit", without affecting the internal structure of the single cell, to avoid damage to the support structure, while effectively supporting the core of the stack, improving the core of the fuel cell module's ability to resist interlayer slippage, and improving the reliability of the fuel cell module.

[0069] For ease of understanding, the specific meanings of the concepts such as "inlet end", "blind end", and "stacking direction" in this application are explained as follows: In a certain fuel cell, the end close to the reaction medium input end is defined as the inlet end, and the end far from the reaction medium input end is defined as the blind end. Correspondingly, the end plate of the stack located at the inlet end is defined as the inlet end plate, and the end plate located at the blind end is defined as the blind end end plate. In a conventional stack, the end plate at the inlet end, the insulating plate at the inlet end, the current collecting plate at the inlet end, the core, the current collecting plate at the blind end, the insulating plate at the blind end, and the end plate at the blind end are stacked in sequence. The stacking direction of the various components of the stack is defined as the stacking direction, also known as the X direction; the long side direction of the inlet end plate / bipolar plate of the stack is the Y direction; the short side direction of the inlet end plate / bipolar plate of the stack is the Z direction. When the fuel cell is installed on the vehicle, it is usually installed with the large surface (the side with the largest area of ​​the fuel cell, the side extending in the long side direction and the stacking direction) facing downward. In the installation posture, the lower surface of the fuel cell is the "bottom surface", and the corresponding direction is the "bottom end"; the upper surface is the "top surface", and the corresponding direction is the "top end". For the convenience of description, the following embodiments use the abbreviations of the respective definitions.

[0070] See also Figure 1 and Figure 2 , showing the overall structure diagram and exploded diagram of the fuel cell module provided by the first embodiment of the present application. The fuel cell module includes a box body 100, a stack 200, an insulating support assembly 10, and two or more beams 20. The box body 100 cooperates with the insulating support assembly 10 and the two or more beams 20 to form an integral package for the stack 200, and jointly applies a fastening force along the stacking direction to the stack 200, so that the stack 200 does not need to be additionally provided with a fastening assembly for providing a fastening force.

[0071] See also Figure 2 and Figure 4 The box body 100 includes a supporting frame 180, an air intake end plate assembly 210 and a blind end side plate 120. The supporting frame 180 is provided with an air intake port 102 and a blind end port 103 which are interconnected; the air intake end plate assembly 210 is connected to the supporting frame 180 and covers the air intake port 102; the blind end side plate is connected to the supporting frame 180 and covers the blind end port 103.

[0072] The stack 200 is arranged in the supporting frame 180. The stack 200 includes an intake end plate assembly 210, an intake end current collector 230, a core 240, a blind end current collector 250 and a blind end plate assembly 270 arranged in sequence. The core 240 includes more than two stacked single cells. All components of the stack 200 except the intake end plate assembly 210 are completely encapsulated in the inner cavity of the box 100. The intake end plate assembly 210 serves as the intake end plate of the stack 200 and the intake end side plate of the box 100 at the same time, thereby improving the volume power density of the fuel cell module 1000.

[0073] An insulating layer should be provided between the air intake end plate assembly 210 and the air intake end collector plate 230, and between the blind end collector plate 250 and the blind end plate assembly 270. In some embodiments, an air intake end insulating plate is provided between the air intake end plate assembly 210 and the air intake end collector plate 230; in other embodiments, an insulating layer may be coated on the inner end surface of the air intake end plate assembly 210 to play the role of an air intake end insulating plate, for example, the air intake end plate assembly 210 is an aluminum-plastic composite integrated end plate, which integrates the function of an air intake end insulating plate. In some embodiments, a blind end insulating plate is provided between the blind end collector plate 250 and the blind end plate assembly 270; in other embodiments, an insulating layer may be coated on the inner end surface of the blind end plate assembly 270 to play the role of a blind end insulating plate.

[0074] In some embodiments, the blind end plate assembly 270 may include a blind end insulating plate and a blind end plate; in other embodiments, the blind end plate assembly 270 may include a blind end plate 271, a disc spring 272, and a disc spring support plate 273 stacked in sequence, such as Figure 2 In some embodiments, the blind end plate 271 is also an aluminum-plastic composite integrated end plate, integrating the function of a blind end insulation plate.

[0075] See also Figure 5 and Figure 6 The insulating support assembly 10 is disposed between the casing 100 and the stack 200, and the insulating support assembly 10 is in contact with each side surface of the core 240 and each inner side surface of the supporting frame 180. The insulating support assembly 10 is in contact with each component of the core 240, and can support the side surface of the core 240, realize the "external limit" support of the single cell, and resist the interlayer slippage of the core 240, so there is no need to set a complex interlocking structure on the single cell. The insulating support assembly 10 includes a plurality of insulating support members 11 distributed at intervals, and the insulating support member 11 has a certain rigidity, and at least the surface of its outer surface that contacts the core 240 and the casing 100 is an insulating material. For example, the insulating support member 11 can be made of plastic with good rigidity, or the insulating support member 11 can be made of metal, and an insulating layer is attached to its outer surface. The insulating support members 11 are components independent of the box body 100 and the battery stack 200. Compared with the anti-collapse structure in which the box body is directly pressed against the battery stack 200, multiple independent insulating support members 11 are easier to install, and the assembly difficulty of the battery stack 200 is low.

[0076] In some embodiments, the position where each single cell of the core 240 fits with the insulating support 11 is coated with a sealing strip. The sealing strip firstly seals the flow field inside the single cell, secondly acts as an insulator, and thirdly enables the single cell to be in flexible contact and fully fit with the insulating support 11. The flexible contact can reduce the impact of the core 240 on the insulating support 11. In some embodiments, the single cell includes a stacked bipolar plate and a membrane electrode. The sealing strip can be coated on each side of the bipolar plate. The sealing strip can serve as an outer frame sealing ring in the bipolar plate and / or a sealing ring between the bipolar plate and the membrane electrode to seal the cooling field and / or the gas field. The sealing strip can also be used as an insulating material to improve the insulation effect between the core 240 and the insulating support 11.

[0077] See also Figure 7 and Figure 8 The insulating support assembly 10 and the air intake end plate assembly 210, the air intake end collector plate 230, the blind end collector plate 250 and the blind end plate assembly 270 all have a gap A. The gap A is a gap in the Y direction and the Z direction. The impact direction of the end plate, the collector plate, etc. on the insulating support assembly 10 is mainly the Z direction impact, and the secondary is the Y direction impact. Therefore, the gap A can be used as a buffer space to prevent the insulating support assembly 10 from being damaged by the impact of the end plate and the collector plate. In some embodiments, the gap A is 0.2 mm to 5 mm, such as 0.2 mm, 0.5 mm, 1 mm, 1.2 mm, 1.75 mm, 2.3 mm, 2.8 mm, 3.2 mm, 3.5 mm, 3.75 mm, 4 mm, 4.5 mm, etc. If the gap A is too large, the volume of the air intake end plate assembly 210, the air intake end collector plate 230, the blind end collector plate 250 and the blind end plate assembly 270 will be reduced, which is not conducive to the setting of the three cavities on the air intake end plate assembly 210 and the air intake end collector plate 230. If the gap A is too small, in extreme cases, the above-mentioned parts with larger mass may still contact the insulating support assembly 10, causing impact damage to the insulating support assembly 10.

[0078] The load-bearing frame 110 and / or the insulating support assembly 10 are provided with a limiting structure, which is used to limit the displacement of the insulating support assembly 10 in the Y direction and the Z direction relative to the load-bearing frame 110. One end of the insulating support assembly 10 along the X direction is pressed against the blind end side plate 120, and the other end is pressed against the load-bearing frame 110 or the air intake end plate assembly 210, and is constrained in the X direction.

[0079] Two or more cross beams 20 are spaced apart at one end of the box 100 close to the blind end side plate 120. Both ends of the two or more cross beams 20 are fixedly connected to the supporting frame 180, so that the supporting frame 180 applies a fastening force along the stacking direction to the battery stack 200 through the cross beams 20 and in cooperation with the air intake end plate assembly 210. Two or more cross beams 20 are spaced apart between the blind end plate assembly 270 and the blind end side plate 120 of the battery stack 200, and the box 100 applies a fastening force along the stacking direction to the battery stack 200 through the cross beams 20. The cross beam 20 is parallel to the Y direction or the Z direction, and both ends of the cross beam 20 are connected to the supporting frame 180. It will not be displaced due to the restriction of the supporting frame 180, thereby applying a fastening force along the stacking direction to the battery stack 200. Since more than two beams 20 are distributed at intervals, a tightening force can be applied to the entire surface of the blind end plate assembly 270 to achieve uniform distribution of the press-fitting force, which can effectively reduce the problem of plate deformation caused by the large press-fitting force of the high-power battery stack 200.

[0080] See also Figure 1 and Figure 2 , the insulating support member 11 extends along the stacking direction. Fig.10 , Fig.11 and Fig.12 , multiple insulating support members 11 are respectively distributed at each corner of the stack 200 and each side of the stack 200. The insulating support members 11 distributed at the corners of the stack 200 are in contact with two adjacent sides of the stack 200 at the same time. The multiple insulating support members 11 can fully cover the stack 200 from all directions, achieving a full-coverage anti-slip effect for the core 240.

[0081] Taking a rectangular cell with different sides as an example, the number of insulating supports 11 may be 4, and the 4 insulating supports 11 are respectively arranged at the 4 corners of the battery stack 200; the number of insulating supports 11 may be 6, of which 4 insulating supports 11 are respectively arranged at the 4 corners of the battery stack 200, and the remaining 2 insulating supports 11 can be respectively arranged on the long side or short side of the battery stack 200; the number of insulating supports 11 may be 8, of which 4 insulating supports 11 are respectively arranged at the 4 corners of the battery stack 200, and the remaining 4 insulating supports 11 can be respectively arranged on the long side and short side of the battery stack 200. For the convenience of description, the insulating supports 11 distributed at the corners of the battery stack 200 are referred to as corner supports 11b, and the insulating supports 11 distributed on the sides of the battery stack 200 are referred to as side supports 11a.

[0082] See also Fig.10 , Fig.11 and Fig.12In some embodiments, the single cell of the battery stack 200 is a rectangular single cell with different lengths of two sides, and the insulating support assembly 10 includes 10 insulating support members 11: 4 corner support members 11b are respectively arranged at the 4 corners of the battery stack 200, 4 side support members 11a are distributed in pairs on each long side of the battery stack 200, and the remaining 2 side support members 11a are distributed in pairs on each short side of the battery stack 200. In some embodiments, the positions of the 4 side support members 11a located on the two long sides of the battery stack 200 can correspond to each other, or they can be staggered along the long sides; the positions of the 2 side support members 11a located on the two short sides of the battery stack 200 can correspond to each other, or they can be staggered along the short sides.

[0083] See also Fig.10 , Fig.11 and Fig.12 In some embodiments, the positions of the insulating support members 11 located on two opposite sides of the battery stack 200 do not correspond, that is, the positions of the side support members 11a located on different sides of the battery stack 200 do not correspond, for example, the positions of the side support members 11a located on different long sides of the battery stack 200 do not correspond. On the one hand, it is convenient for the assembly of the battery stack 200, and on the other hand, the force positions of the long sides of the battery stack 200 are different, the force is more uniform, and stress concentration is avoided.

[0084] A limiting structure is provided on the supporting frame 110 and / or the insulating support member 11, and the limiting structure is used to limit the displacement of the insulating support assembly 10 in the Y direction and the Z direction relative to the supporting frame 110. Considering that the corner support member 11b contacts two adjacent sides of the stack 200 at the same time, naturally forming a limit in the Y direction and the Z direction, the limiting structure is mainly used to limit the side support member 11a.

[0085] See also Figure 4 and Fig.10 In some embodiments, the limiting structure is configured as at least one limiting boss 111 distributed on the inner side of the supporting frame 110, and a limiting groove 12 is correspondingly provided on at least one side support member 11a, and the limiting boss 111 extends into the limiting groove 12 and abuts against the groove wall of the limiting groove along the circumference of the fuel cell stack 200. The side support member 11a located at the long side of the fuel cell stack 200 is constrained in the Z direction by the core 240 and the supporting frame 110, and the limiting boss 111 and the limiting groove 12 only play a role in the Y direction constraint; the side support member 11a located at the short side of the fuel cell stack 200 is constrained in the Y direction by the core 240 and the supporting frame 110, and the limiting boss 111 and the limiting groove 12 only play a role in the Z direction constraint.

[0086] See also Figure 4 In some embodiments, the side of the supporting frame 110 is provided with more than one opening. Figure 4The illustrated supporting frame 110 is provided with two openings, namely, an upper opening 101 provided at the top and a side opening 104 provided at the side. Correspondingly, the box body 100 further includes at least one cover plate, which is connected to the supporting frame 110 and covers the opening. Since the supporting frame 110 is provided with an upper opening 101 and a side opening 104, two corresponding cover plates are also provided, namely, an upper cover plate (not shown in the figure) for covering the upper opening 101, and a side cover plate 140 for covering the side opening 104.

[0087] The upper opening 101 has a larger area, please refer to Figure 4 In some embodiments, a plurality of longitudinal beams 112 are provided on the upper portion of the load-bearing frame 110, and the longitudinal beams 112 extend along the X direction to strengthen the structural strength of the upper portion of the load-bearing frame 110. The upper opening 101 can also be used as an installation opening for the cross beam 20. In order to facilitate the cross beam to be pushed between the blind end plate assembly 270 and the blind end side plate 120, please refer to Figure 4 In some embodiments, a plurality of guide blocks 114 are provided on the supporting frame 110. The guide blocks 114 are distributed on both sides of the beam 20 in groups of two. The guide blocks 114 are parallel to the beam 20. During installation, the beam 20 is inserted along the gap between the guide blocks 114. After the beam 20 is installed, the guide blocks 114 can also limit the beam 20.

[0088] The inner side of the cover plate is provided with one or more first limit blocks 141, which also extend into the limit groove 12 and press against the groove wall of the limit groove 12 along the circumference of the stack. In some embodiments, the upper cover plate (not shown in the figure) is provided with one or more first limit blocks (not shown in the figure), and the number of the first limit blocks is not less than the number of the side support members 11a located at the top long side of the stack 200. In some embodiments, please refer to Fig.10 One or more first limiting blocks 141 are provided on the side cover plate 140 , and the first limiting blocks 141 extend into the limiting grooves 12 of the side support members 11 a at corresponding positions.

[0089] In some embodiments, see Fig.14 At least one side support member 11a corresponds to the position of the cross beam 20, and a second limit block 21 is provided on the cross beam 20. Fig.21 The second limiting block 21 extends into the limiting groove 12 and presses against the groove wall of the limiting groove 12 along the circumference of the stack 200 . The crossbeam 20 also limits the corresponding side support member 11a in the Y direction or Z direction.

[0090] See also Figure 2 In some embodiments, a plurality of limiting columns 121 are provided on the blind end side plate 120, one end of the plurality of insulating support members 11 is pressed against the supporting frame 110 or the air intake end plate assembly 210, and the other end is pressed against the plurality of limiting columns 121 one by one to achieve X-axis constraint.

[0091] The insulating support 11 needs to be in direct contact with the core 240 and the box 100, and the surface quality of the contact surface should be as high as possible. Fig.12 In some embodiments, at least one insulating support member 11 is provided with a ridge 14, which can be provided on one of the side surfaces of the insulating support member 11, or the ridge 14 can be provided on both sides of the insulating support member 11. The ridge 14 contacts the core 240 and / or the housing 100. By providing the ridge 14, on the one hand, the area of ​​the contact surface between the insulating support member 11 and the core 240 and / or the housing 100 is reduced and does not exceed the area of ​​the end surface of the ridge 14. The ridge 14 protrudes outward, which is convenient for processing the end surface. After the insulating support member 11 is manufactured, only the contact surface needs to be finely processed, which is convenient for achieving high flatness on a limited area and reducing the manufacturing difficulty; on the other hand, the weight of the insulating support member 11 can be reduced, so that the weight of the entire fuel cell module 1000 is reduced.

[0092] In some embodiments, a local convex surface may also be provided at a corresponding position on the box body 100, and the local convex surface contacts the locally processed surface of the insulating support 11, which can not only ensure the matching accuracy of the contact surface, but also reduce the processing area of ​​the inner surface of the box body 100, thereby facilitating the realization of high flatness in a limited area and reducing the manufacturing difficulty.

[0093] See also Fig.12 In some embodiments, two or more ridges 14 are provided on both sides of the insulating support 11, and a through groove 13 is formed between two adjacent ridges 14 on the same side. The through groove 13 is through along the X direction, and the notch of the through groove 13 faces the battery stack 200, which can be used to install the positioning rod 30 used in assembling the battery stack 200. A limiting groove 12 can also be formed between two adjacent ridges 14 on the same side.

[0094] Since there is a gap A between the end plates, current collectors and insulating support assembly 10 at both ends of the stack 200, the above parts need to be provided with limiting structures in the Y and Z directions. Specifically, the intake end plate assembly 210 is connected to the bearing frame 110 to achieve limiting in the three directions of X, Y and Z. The intake end plate assembly 210 and / or the intake end current collector 230 are provided with a first positioning structure, and the intake end current collector 230 is limited in the Y and Z directions through the first positioning structure. The blind end current collector 250 and / or the blind end plate assembly 270 are provided with a second positioning structure, and the blind end current collector 250 and the blind end plate assembly 270 are limited in the Y and Z directions through the second positioning structure.

[0095] See also Fig.11The blind end plate assembly 270 is also limited in position by abutting against the cross beam 20 through the limiting grooves 274 provided thereon. Specifically, the outer end surface of the blind end plate assembly 270 is provided with a plurality of limiting grooves 274 corresponding to the cross beams 20. The cross beams 20 are arranged in the corresponding limiting grooves 274, and at least one cross beam 20 is pressed against the groove wall of the limiting groove 274. Since both ends of the cross beam 20 are connected to the load-bearing frame 110, the position of the cross beam 20 is determined, and thus the position of the blind end plate assembly 270 is determined.

[0096] See also Figure 7 In some embodiments, the first positioning structure is set as a first positioning pin 211 located on the intake end plate assembly 210, and the intake end collector plate 230 is provided with a first positioning hole 231 for the first positioning pin 211 to extend into. The first positioning pin 211 can be a part independent of the intake end plate assembly 210, or it can be integrated with the intake end plate assembly 210. The size of the first positioning pin 211 exceeding the intake end plate assembly 210 is not greater than the thickness of the intake end collector plate 230 to prevent the intake end collector plate 230 from being pierced. The material of the first positioning pin 211 is high-strength steel, which has high strength and is not easy to deform. In some embodiments, there are two first positioning pins 211, and the center line of the two first positioning pins 211 divides the intake end plate assembly 210 into two equal parts. The pin or pin hole is generally the design, manufacturing and assembly reference. The position of the two first positioning pins 211 is selected to be the position of the intake end plate assembly 210 divided into two equal parts, which is more conducive to improving the manufacturing accuracy of all areas of the parts and reducing deformation.

[0097] See also Figure 3 In some embodiments, the second positioning structure is configured as a second positioning pin 275 located on the blind end plate assembly 270, and the blind end current collecting plate 250 is provided with a second positioning hole 251 for the second positioning pin 275 to extend into, such as Fig.12 The second positioning pin 275 can be a part independent of the blind end plate assembly 270, or can be integrated with the blind end plate assembly 270. The size of the second positioning pin 275 beyond the blind end plate assembly 270 is not greater than the thickness of the blind end collector plate 250, so as to prevent the blind end collector plate 250 from being pierced. The material of the second positioning pin 275 is high-strength steel, which has high strength and is not easy to deform.

[0098] See also Figure 2 In some embodiments, the blind end plate assembly 270 may include a blind end plate 271, a disc spring 272, and a disc spring support plate 273 stacked in sequence, and the blind end plate 271 may be integrated with a blind end insulation plate 260. The second positioning pin 275 is provided on the first end surface of the blind end plate 271, and the first end surface faces the blind end current collecting plate 250. The limiting groove 274 is provided on the outer end surface of the disc spring support plate 273, such as Fig.11To achieve the installation of the disc spring and the positioning between the blind end plate 271, the disc spring 272 and the disc spring support plate 273, please refer to Figure 6 and Fig.10 The second end surface of the blind end plate 271 is provided with a plurality of guide bosses 276 for positioning the disc spring 272, and the second end surface faces the disc spring support plate 273. The disc spring support plate 273 is provided with a plurality of guide holes 277, and the guide bosses 276 penetrate the disc spring 272 and extend into the guide holes 277, and abut against the hole wall of the guide holes 277.

[0099] The guide boss 276 on the blind end plate 271 is used to guide the disc spring 272 and realize the radial (including Y and Z directions) internal limitation of the disc spring 272. The guide hole 277 located in the middle of the disc spring support plate 273 is used to support the disc spring 272, and at the same time allows the end of the guide boss 276 to extend into. The guide hole 277 located at the edge is used to cooperate with the guide boss 276, so as to realize the Y and Z direction limitation of the blind end plate 271 and the disc spring support plate 273. The blind end plate 271 and the disc spring support plate 273 are connected in the X direction through the disc spring 272. The opening of the guide hole 277 and the notch of the limiting groove 274 are distributed on opposite sides of the disc spring support plate 273. From the perspective of weight reduction, the guide holes 277 and the limiting grooves 274 at corresponding positions can be connected. Fig.19 shown.

[0100] In the blind end plate assembly 270, the disc spring support plate 273 serves as the positioning basis, and the blind end plate 271 and the disc spring 272 are both fixed on the disc spring support plate 273. Therefore, the position accuracy of the disc spring support plate 273 directly affects the position accuracy of the blind end plate 271 and the disc spring 272. As mentioned above, the disc spring support plate 273 is positioned by the compression of the cross beam 20 in the X direction, and is positioned by the cross beam 20 pressing against the groove wall of the limiting groove 274 in the Y direction or Z direction. The specific positioning direction depends on the arrangement of the cross beam 20. For example, a number of cross beams 20 are arranged at intervals along the long side direction of the bipolar plate, that is, the Y direction, and the cross beam 20 itself extends along the Z direction, then the cross beam 20 plays a role of limiting the disc spring support plate 273 in the Y direction. A number of cross beams 20 are arranged at intervals along the short side direction of the bipolar plate, that is, the Z direction, and the cross beam 20 itself extends along the Y direction, then the cross beam 20 plays a role of limiting the disc spring support plate 273 in the Z direction. In some embodiments, the crossbeam 20 is V-shaped and has projection components in the Y direction and the Z direction, so the crossbeam 20 can limit the disc spring support plate 273 in the Y direction and the Z direction at the same time.

[0101] Fig.11 In the fuel cell module shown, the cross beams 20 are arranged at intervals along the long side direction of the bipolar plate, i.e., the Y direction. The cross beams 20 themselves extend along the Z direction. The cross beams 20 limit the disc spring support plate 273 in the Y direction. Therefore, other limiting structures are required to limit the disc spring support plate 273 in the Z direction. Fig.15 , Fig.16 , Fig.17 , Fig.18 , Fig.19 and Fig. 20 In some embodiments, a first boss 278 and a second boss 279 are provided on two opposite sides of the disc spring support plate 273, and the first boss 278 and the second boss 279 both protrude outward relative to the main body of the disc spring support plate 273. The first boss 278 abuts against the supporting frame 210, such as Fig.18 As shown, the position limitation on one side of the Z direction is realized, and the specific position and number of the first boss 278 are not limited in this application. Fig. 20 In the disc spring support plate 273 shown, the first boss 278 is located in the middle of the side on which it is located.

[0102] See also Fig.21 , shows a schematic diagram of the structure of the crossbeam 20 in some embodiments, the crossbeam 20 is provided with a third boss 22, and the third boss 22 abuts against the second boss 279, such as Fig.17 As shown, the position of the second boss 279 is limited to the other side of the Z direction. Since the second boss 279 cooperates with the crossbeam 20, the second boss 279 needs to correspond to the position of the limiting groove 274 one by one, as shown in FIG. Fig. 20 shown.

[0103] The fuel cell module is an integral body including a stack 200, a high-voltage assembly 300, a low-voltage assembly (not shown in the figure) and an externally packaged box 100. The high-voltage assembly 300 generally includes an electrically connected copper busbar assembly and a through terminal 320. The copper busbar assembly is electrically connected to the current collecting plate of the stack 200, and the electric energy generated by the stack 200 is output by the through terminal 320. The low-voltage assembly is electrically connected to the core 240 of the stack 200 to perform voltage inspections on the bipolar plates or single cells. The stack 200, the high-voltage assembly 300 and the low-voltage assembly are all installed and fixed by the box 100.

[0104] See also Fig.13 In order to facilitate the assembly of the high-voltage component 300 and the low-voltage component, a protrusion 113 is provided on one side of the carrier frame 110, and the protrusion 113 is located on one of the side surfaces of the carrier frame 110 except the two end surfaces of the blind end and the air inlet end. The protrusion 113 is a part of the carrier frame 110 that protrudes outward, and the interior of the protrusion 113 is connected to the inner cavity of the carrier frame 110. The high-voltage component 300 is installed on the protrusion 113, specifically, the copper busbar assembly is located in the protrusion 113, and the through terminal 320 is installed on the protrusion 113. The upper part of the through terminal 320 extends out of the protrusion 113 for connecting the high-voltage wiring harness, and the lower part of the through terminal 320 extends into the protrusion 113 for electrical connection with the copper busbar of the copper busbar assembly through high-voltage bolts.

[0105] In some embodiments, the low-voltage component is installed below the protruding portion 113, making reasonable use of the space below the protruding portion 113. The low-voltage component can be completely located outside the load-bearing frame 110, or can be partially located outside the load-bearing frame 110. The area below the protruding portion 113 on the load-bearing frame 110 is provided with a low-voltage installation port 105, and the low-voltage component or low-voltage wiring harness passes through the low-voltage installation port 105. Figure 5 and Fig.13 In some embodiments, the box body 10 further includes a low-voltage packaging component 160 , which is connected to the load-bearing frame 110 , and the low-voltage components are packaged in the low-voltage packaging component 160 .

[0106] Since the high-voltage assembly 300 and the low-voltage assembly are separated by the outer protrusion 113, on the one hand, since the load-bearing frame 110 is usually made of metal material, the outer protrusion 113 can effectively achieve electromagnetic shielding of high voltage and low voltage; on the other hand, since the through terminal 320 is directly installed on the load-bearing frame 110, the intake end plate assembly 210 of the stack 200 is also connected to the load-bearing frame 110, and the through terminal 320 and the collector connected to the high-voltage copper busbar are both based on the load-bearing frame 110 as the installation reference, so the high-voltage assembly 300 does not need to be installed with the help of other tooling structures, and the assembly operation is simple. In addition, since the copper busbar assembly is located in the outer protrusion 113, the bottom plate of the outer protrusion 113 can also prevent the high-voltage bolt 340 from falling into the inner cavity of the load-bearing frame 110.

[0107] See also Fig. 22 and Fig.23 The second embodiment of the present application provides an assembly positioning assembly for assembling a fuel cell module of any embodiment of the first embodiment. The assembly positioning assembly includes an assembly positioning assembly 40, a guide bracket 50 and more than four positioning rods 30, and the more than four positioning rods 30 are distributed on four sides of the fuel cell stack 200.

[0108] The positioning rods 30 are usually arranged along the stacking direction of the battery stack 200, and the length of each positioning rod 30 is not less than the sum of the length of the shell 100 and the height difference Δh of the battery stack 200 before and after press-fitting. Among the positioning rods 30, at least two positioning rods 30 extend into the through slot 13 of the insulating support member 11, specifically, extend into the through slot 13 of the side support member 11a located on two adjacent sides of the battery stack 200. In other words, part of the positioning rods 30 are located in the through slot 13 and fixed by the side support member 11a; the remaining positioning rods 30 are located outside the through slot 13 and are directly arranged between the battery stack 200 and the box 100.

[0109] In some embodiments, the thickness H1 of the positioning rod 30 in the through slot 13 is not greater than the depth H2 of the through slot 13, and the width L1 of the positioning rod 30 in the through slot 13 is less than the width L2 of the through slot 13, so as to prevent the stack 200 from sliding sideways during assembly, squeezing the positioning rod 30, and making it impossible to disassemble the positioning rod 30. In some embodiments, the thickness H4 of the positioning rod 30 outside the through slot 13 is not greater than the thickness H3 of the insulating support 11 on the same side, so that the core 240 can slide sideways and the squeezing force can be transferred from the positioning rod 30 to the insulating support 11 on the same side through assembly.

[0110] Since the width L1 of the positioning rod 30 in the through groove 13 is smaller than the width L2 of the through groove 13, after the positioning rod 30 is installed in the through groove 13, the positioning rod 30 may shake in the depth direction of the through groove 13, which is not conducive to assembly. In addition, when the battery stack 200 is assembled, the insulating support member 11 is only arranged on two adjacent sides of the battery stack 200 to provide the through groove 13, and the insulating support member 11 serves as the assembly basis for the two corresponding sides when the battery stack 200 is assembled. The other two adjacent sides of the battery stack 200 use the positioning rod 30 as the assembly basis for the two corresponding sides when the battery stack 200 is assembled, which will cause the assembly basis of the battery stack 200 to be inconsistent, and one of the keys to improving the consistency of the battery stack 200 is that the core 240 is in contact with the same part and the same surface as much as possible during the press-fitting process. The provision of the fixed bracket 40 can solve this problem.

[0111] The fixing bracket 40 is installed on the peripheral side of the blind port 103 of the supporting frame 110 and is fixedly connected to the corresponding positioning rod 30, and is used to assist in fixing the positioning rod 30 so that the end face of the positioning rod 30 located in the through groove 13 facing the battery stack 200 protrudes out of the through groove 13. As a result, when the battery stack 200 is assembled, the assembly basis of each side is the positioning rod 30, and the assembly basis of the battery stack 200 is consistent. In addition, the positioning rod 30 has a high manufacturing precision as a tooling part, which further ensures the consistency of the battery stack 200 during the assembly process.

[0112] The guide bracket 50 is installed on the peripheral side of the blind port 103 of the load-bearing frame 110, and the end face of the guide bracket 50 is flush with the inner side face of the load-bearing frame 110, specifically, it is flush with the inner side face that matches the first boss 278. When installing the disc spring support plate 273, it is necessary to fit the first boss 278 with the end face of the guide bracket 50, and place the disc spring support plate 273 downward along the end face of the guide bracket 50, so that when the battery stack 200 is pressed to the theoretical height by the press, the first boss 278 just fits with the inner side face of the load-bearing frame 110, and after the crossbeam 20 is installed, the third boss 22 of the crossbeam 20 abuts against the second boss 279 of the disc spring support plate 273, thereby driving the first boss 278 to abut against the inner side face of the load-bearing frame 110, completing the X, Y, and Z three-dimensional limit of the disc spring support plate 273.

[0113] The structures of the fixing bracket 40 and the guiding bracket 50 can be designed according to their installation positions and the structure of the box body 100, and this application does not impose any limitation thereto.

[0114] The third aspect of the present application provides a vehicle, comprising at least one fuel cell module as described in any of the embodiments of the first aspect. Specifically, the vehicle comprises a fuel cell power system, the fuel cell power system comprises a fuel cell system, a DC / DC converter, a drive motor and its motor controller, and an on-board energy storage device, the fuel cell system comprises a fuel cell module and a fuel cell auxiliary system, and the fuel cell system can operate normally under the condition of an external fuel supply source.

[0115] The vehicle can be a hydrogen energy vehicle or a hydrogen energy + charging hybrid electric vehicle, and can be a family car, a bus, a truck, etc. Since the specific structure of the vehicle is not improved in this embodiment, the structure of the vehicle that has not been changed in this embodiment can refer to the prior art, and the specific content is not described here. Therefore, the vehicle has all the features and advantages described above for the fuel cell module, which will not be repeated here.

[0116] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0117] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0118] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0119] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0120] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0121] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0122] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0123] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A fuel cell module, characterized in that: include: The box body comprises a bearing frame, an air intake end plate assembly and a blind end side plate, wherein the bearing frame is provided with an air intake port and a blind end port which are interconnected; the air intake end plate assembly is connected to the bearing frame and covers the air intake port; the blind end side plate is connected to the bearing frame and covers the blind end port; A battery stack is arranged in the supporting frame, the battery stack comprises the intake end plate assembly, the intake end current collecting plate, the stack core, the blind end current collecting plate and the blind end plate assembly arranged in sequence, the stack core comprises more than two stacked single cells; An insulating support assembly is provided between the box and the stack, the insulating support assembly is in contact with each side surface of the core and each inner side surface of the supporting frame, and has gaps with the intake end plate assembly, the intake end current collector, the blind end current collector and the blind end plate assembly; the insulating support assembly includes a plurality of insulating support members spaced apart along the circumference of the stack; Two or more cross beams are spaced and distributed at one end of the box body close to the blind end side plate; both ends of the two or more cross beams are connected to the supporting frame, so that the supporting frame applies a fastening force along the stacking direction to the stack through the cross beams and in cooperation with the air intake end plate assembly; Among them, a first positioning structure is provided on the air intake end plate assembly and / or the air intake end collecting plate; a second positioning structure is provided on the blind end collecting plate and / or the blind end plate assembly; a limiting structure is provided on the supporting frame and / or the insulating support assembly; and a plurality of limiting grooves corresponding to the cross beams are provided on the outer end surface of the blind end plate assembly, the cross beams are arranged in the corresponding limiting grooves, and at least one cross beam is pressed against the groove wall of the limiting groove.

2. The fuel cell module according to claim 1, characterized in that: The insulating support member extends along the stacking direction, and a plurality of the insulating support members are respectively distributed at each corner of the battery stack and each side of the battery stack; The limiting structure is configured as at least one limiting boss distributed on the inner side surface of the supporting frame, and a limiting groove is correspondingly provided on at least one of the insulating support members distributed on the side surface of the battery stack. The limiting boss extends into the limiting groove and presses against the groove wall of the limiting groove along the circumference of the battery stack.

3. The fuel cell module according to claim 2, characterized in that: The side of the bearing frame is provided with one or more openings, and the box body further comprises one or more cover plates, which are connected to the bearing frame and cover the openings; One or more first limiting blocks are disposed on the inner side surface of the cover plate. The first limiting blocks extend into the limiting groove and press against the groove wall of the limiting groove along the circumference of the battery stack.

4. The fuel cell module according to claim 2, characterized in that: At least one of the insulating support members distributed on the side of the battery stack corresponds to the position of the crossbeam, and a second limit block is provided on the crossbeam. The second limit block extends into the limit groove and presses against the groove wall of the limit groove along the circumference of the battery stack.

5. The fuel cell module according to claim 1, characterized in that: The blind end side plate is provided with a plurality of limiting posts, one end of the plurality of insulating support members is pressed against the supporting frame or the air intake end plate assembly, and the other end is pressed against the plurality of limiting posts one by one.

6. The fuel cell module according to any one of claims 1 to 5, characterized in that: The first positioning structure is configured as a first positioning pin located on the intake end plate assembly, and the intake end collector plate is provided with a first positioning hole for the first positioning pin to extend into; The second positioning structure is configured as a second positioning pin located on the blind end plate assembly, and the blind end current collecting plate is provided with a second positioning hole for the second positioning pin to extend into.

7. The fuel cell module according to any one of claims 1 to 5, characterized in that: The blind end plate assembly includes a blind end plate, a disc spring and a disc spring support plate stacked in sequence, the second positioning structure is arranged on the first end surface of the blind end plate, and the limiting groove is arranged on the outer end surface of the disc spring support plate.

8. The fuel cell module according to claim 7, characterized in that: A plurality of guide bosses for positioning the disc spring are provided on the second end face of the blind end plate, and the disc spring is sleeved on the guide bosses; a plurality of guide holes are correspondingly provided on the disc spring support plate, and the guide bosses extend into the guide holes, and at least one of the guide bosses presses against the hole wall of the guide hole.

9. The fuel cell module according to claim 7, characterized in that: A first boss and a second boss are provided on two opposite sides of the disc spring support plate; the first boss abuts against the supporting frame; A third boss is disposed on the crossbeam, and the third boss abuts against the second boss.

10. The fuel cell module according to claim 7, characterized in that: The insulating support members located at two adjacent side surfaces of the cell stack are provided with through slots penetrating along the stacking direction of the cell stack, and the notches of the through slots face the cell stack.

11. An assembly and positioning assembly for assembling a fuel cell module according to any one of claims 1 to 10, characterized in that: include: More than four positioning rods are distributed around the battery stack, and along the stacking direction of the battery stack, the length of each positioning rod is not less than the sum of the length of the box and the height difference Δh of the battery stack before and after press-fitting; A fixed bracket, installed on the peripheral side of the blind end of the bearing frame and fixedly connected to the corresponding positioning rod; The guide bracket is installed on the peripheral side of the blind end portion of the bearing frame, and the end surface of the guide bracket is in contact with the side surface of the blind end end plate assembly.

12. The fuel cell module according to claim 11, characterized in that: In the case where the insulating support members located on two adjacent sides of the battery stack are provided with through grooves, at least two of the positioning rods extend into the through grooves of the insulating support members; When the disc spring support plate is provided with a first boss, the end surface of the guide bracket is in contact with the first boss.

13. A vehicle, characterized in that: Comprising the fuel cell module according to any one of claims 1-10.

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